GM Instrumentation are specialist suppliers of Pressure, Temperature, Level, Flow, Gas detection, Fluid Power & Calibration Instrumentation.

Our main scope of supply consists of:

Portable Pressure Calibrators from -1 Bar up to 1000 Bar

Pressure Transmitters & switches

Vacuum, Compound & Pressure Gauges

Speciality Gauges Including Differential, Chemical Seal, Subsea, Tank Contents, Digital, Absolute & Electrical Contact


Type B, E, J, K, N, R, S, T, U & W Thermocouples

PT100 Sensors

USDA Temperature Probes

Exhaust Gas Pyrometers. 50 - 650°c

Portable Temperature Calibrators

Sika Thermometers & Glass Inserts

Stem and Capillary Thermometers

Digital Thermometers

Infra Red Thermometers.


Tank level gauges

Flow meters

Peak Flow Indicators

Fixed Gas Detection Equipment

Portable Gas Detection Equipment

Ultrasonic Leak Detectors.


We offer an In-house Calibration & repair facility as well as On Site Service & Calibration Engineers.

UKAS Calibration Available

GMI also provides a full service & Calibration facility for all types Of Gas Detection, Electrical & Alcohol testing Equipment

The products that we supply come from the world leaders Including, WIKA, SIKA, Trafag, Danfoss, Alfa Laval, Emerson, VAF, Aqua Metro, Crowcon, Parker, Lemag, Kongsberg to name a selected few.

Bespoke manufacturing services available so that we can supply products to your specific requirements.

We have the facility to source any product desired from our extensive global network and delivery can be scheduled for any port.